Those rates are both well above what a average miner can expect. 5850S normally wish on at 360mh/s and 6850s at 213mh/s

I quoted the 6870 not 6850. Those are both the extremes of the card so its not like I wasn't equal to both cards. In the best case scenario thats the ratio you should expect from each and it should follow a similar pattern as you clock the cards less and less.